Method of making cups or casings for electric-light fixtures.



w. M. HORTON. METHOD OF MAKING CUPS 0R CASINGS FOR ELECTRIC LIGHT FIXTURES.

APPLICATION FILED 8.2531918.

Patented Apr. 1, 1919.

2 SHEETS-SHEET l- W. M. HORTON.

METHOD OF MAKING CUPS 0R CASINGS FOR ELECTRIC LIGHT FIXTURES. APPLICATION FILED FEB-25.1918.

1 ,298,71 7. Patented Apr. ,1, 1919,

2 SHEETS-SHEET 2.

- required about nine operations.

Is A.

j UNITED STATES PATENT OFFICE.

WIIiIJIAM'M.- HQRTON, ,OE CLEVELAND, OHIO,.ASSIGN OR '10 ADAMS-BAGNALL ELECTRIC n COMPANY, OF CLEVELAND, OHIO. i

' V OF ,MAKIITG' CUPS OR CASINGS FORELECTRIC-LIGH'J." FIXTURES.

" Tb all wltofm' it may concern: "Be" it known that; I, WILLIAM- M; HoR'roN,

' "r' a citiiian of' the-U nit'ed States, residing at Cleveland, ;in sthe, countyof @uyahoga and B State of Ohio, have invented certain; new

and useful Improvements in- Methods of,

s"or"Gasings for Electric-Light 10 This invention relates to electric fixtures} annular ring 3 for the reception of the shade,

this ring being provided with a bead 4 by means of which the shade is secured to the fixture. The dome 2 and the ring are spaced apart and connected by an annular portion 25,5,which is fluted or corrugated. The annular portion 5 extends within and is secured to the dome 2 while the annular ring 3 extends within and is secured to the annularly corrugated portion 5. This construction produces a chimney like effect when the lamp is in the socket and permits air to be drawn through the openings formed by the corrugations adjacent to the ring 3, and to be discharged through the corrugations within 5 the dome 2, the corrugations thus providing for the proper radiation of the heat from the lamp.

Heretofore it has been the practice to draw in a large press this corrugated shell, which After this 7 was done the bottom had to be punched out. The annular ring 3 was also drawn and then cut into the proper length.

It is therefore the object of the present improvement to reduce the labor, expense and time heretofore required to form these cu s or casings.

n the drawings accompanying and formin a part of this'specification,

I igure 1 is a perspective view of this improved cup or caslng assembled; Fig. 2 illustrates the several parts thereof ready to be assembled; Fig 3. illustrates the blank from which the corrugated annular member 5 is made; Fig. 4 illustrates the manner in which a I Specification of Letters Patent.

which the following a specicorrugated member will Patented Apr.1,i1919. A

" Application filed'February 25, 1918. Serial No. 219,078.

the blank shown in Fig. 3 .is transformed intothe corrugated annular member 5; Fig. 5 illustrates theblank strip for the ring and Figr6 illustrates the manner'in which the shade-holding annular ring?) is made. 0

. Similar characters of reference indicate corresponding parts in the several figures of the drawings.

In the present improved method of making'the cup or casing, the dome 2 is drawn v into the desired shape having preferably a slight turned-out or flaring skirt portion 2 and a central opening 2". The annular corrugated member 5 is formed from a strip of flat metal 5' of the desired width by 7 0 running it through corrugated rolls to provide the crosswise or transversely extending corrugations 5". The narrow annular shadeholding ring 3 is formed from a strip 3, it being run through a suitable pair of rollers 7 to provide the lengthwise extending rib or bead 4:.

After the parts are formed in the manner shown and described, then the annular corrugated member is inserted into the dome 2 0 and spot-welded thereto at intervals. Thereupon the annular shade-holding member is inserted into the lower end of the corrugated member 5 and likewise spot-welded thereto. In practice the meeting ends of the preferably overlap and may likewise be spot-welded together if desired, but the spot-welding of the annular ring and the dome to the annular corrugated member will hold the parts in place efficiently.

Thus, by this improved method of forming this casing or cup a number of operations heretofore necessary in the making of same have been entirely done away with and the expense. labor and time required to produce the same also largely eliminated.

I claim as my invention:

1. The method of making a cup or casing for an electric light fixture, which consists in drawing a metal dome-shaped member, passing a strip of sheet metal through corrugated rolls thereby to form therein when assembled air passages from edge to edge thereof, then bending the same into an annular member with overlapping edges, then passing a strip of metal through rolls to form a beaded annular member, then assembling the several members by inserting the upper edge of the annular corrugated mem- 110 her into thevdome-shaped member, and then inserting the annular beaded member into the lower edge of the corrugated member whereby the corrugations will form air passages leading from the outside of the annular beaded member into the inside of the dome-shaped member and connecting said members together.

2. The method of making a cup or casing for an electric light fixture, which consists in drawing a metal dome-shaped member, passinga strip of sheet metal through corrugated rolls thereby to form therein when assembled air passages from edge to edge thereof, then bending the same into an annular member with overlapping edges, then passing a strip of metal through rolls to Copies of this patent may be obtained for live cents each, by addressing the form a beaded annular member, then assem-.

beaded member into the inside of the domeshaped member, spot-welding the overlapping edges of the annular corrugated member and spot-welding said corrugated member to the dome-shaped member and the annular member to the corrugated member.

Signed at Cleveland, Ohio, this 11 day of February, 1918.

WILLIAM M. HORTON.

"Commissioner of Eat-ants,

Washington, D. 0." 

